Used primarily as a monomer in the synthesis of conductive and fluorescent polymers, especially in organic electronics such as OLEDs and field-effect transistors. Its rigid naphthalene backbone with ethynyl groups enables strong π-conjugation, enhancing electron mobility and thermal stability in resulting materials. Also employed in the development of advanced resins and high-performance polymers for aerospace and microelectronics due to its ability to form thermally stable, cross-linked networks. Additionally, serves as a building block in supramolecular chemistry and sensor design for detecting aromatic analytes through fluorescence quenching.